Rotary compressor and exhauster



June 10 J. JOHNSTEN ROTARY COMPRESSOR AND EXHAUSTER BlQQO 2 Sheets-Sheet Z372 ezafbor June 10, 19m. 1,497,335'

J. JOHNSTEN ROTARY COMPRESSOR AD XHAUSTER Filed Sept. 8. 1920 2 Sheets-Sheet 2 172i, fezz Patented .lune l 1924.

EN?? gli S Meant ,r-arent esi-fic JoHN JoHNsrnN, or'fLcNnoN, ENGLAND, A'ssIe'fNonVv orf ONE-HALF ro Gaona rNnU- MATIC ENGINEERING COMPANY,

LIMITED, OF LONDON, ENGLAND.

ROTARY COMPRESSOR AND EXHAUSTER.

Application filed September, 1920.V Serial No. 409,019(

T all whom it may concer/n Be it known that I, JOHN JoHNsrnN, a subject of the King of Great Britain and Ireland, and residing at l Victoria Street,

London, S. W. l, England, have invented certain new and useful Improvements in and Relating to Rotary Compressors and EX- hausters, of which the following is a specification. f This invention relates to rotary compressors and exhausters vof the type comprising an inner rotor and an outer casing or member (either rotary or fixed.) arranged eccentrically to one another and having a centrifugally held annular liquid piston inthe space between the said'members.

The object of the invention is to provide an" improved form of device of the above character, andtheinvention consists yin a machine'of the type referred to comprising a rotor having a plurality of peripheral webs, l discs, or plates thereon Vand with a portthrough said webs or the like, and a plate or the like, or a plurality of such adjacent to the port for deflecting the gas from one' side to the other of the rotor during its rotation so that it enters the machine at one side of the port and after traversing the passages formed Vby the webs or the like will leavey the machine at the other side of the port; Y

The invention also comprises varyingthe number of webs, or the like portsand de"- flecting plates as may be found most suitable for the fulfilment of any given practical requirements. Y v

, The accompanying` drawings; illustrate two forms of rotor or impeller and a complete machine in accordance with the in-V vent-ion,

Figure 1 is a front elevation of a lefthanded impeller. i

Figure 2 is a section on the line fi-B of Fi ire l, and

*igure 3 is a developed plan.

Figure 4 is a similar view to Figure 2, showing a right-handed ilnpeller.

Figure 5 is a transverse sectional elevation showing a complete machine in accordance with the invention.

In carrying my invention into effect in one convenient manner I' form my improved machine with the usual outer drum or casing a and an inner rotor c arranged eccentrically thereto with anannular liquid pistonwithinthe space between the two members, but the rotor IV provide with a plural-n ity of upstanding-webs or partitions a running periplierally round the rotor in order to form a number of passages b corresponding to the numberof webs or the like adapted, which vwebs or the like may be formed with or rigidly secured to the rotor c.

At `two Vdiame'trically opposite points of the rotor I provide a port CZ which is formed through' allkv the ribs or webs, the depth of the port, being substantially equal to ror slightly greaterfthanthe total displacement of one member relatively to the otherfdue to theleccentricarrangement] Y i l Adjacentfto each port I providehone or i more plates e of a; depth substantially equal tothe depth of the'port, such .plateV or plates being arranged at an'in'clination to the peripheral websr4 or ribs jin order troefl'ect lateral displacement of ythe gas from-one side of the machine to the other duringV the rotation of the rotor. Y

LLI!

In the construction shown, for examplal providefthe rotor with five ribs andr each v port with two deecting plates, one of which and Imay also'modifythe'number of ribs or webs andthe number and arrangement of deflecting plates to suit any particular requirements that may have to be fulfilled.

Furthermore, I may arrange at one or each side of the rotor ashrouding plate f which may be closely adjacent to the rotorV or may be distanced apart therefrom in order to form extensions of the ports, which extended chambers are limited by stop members or distance pieces g provided for the purpose. Y

The operation of the device is similar to that of compressors or exhausters of the kind to which the invention refers in that the rotation of the eccentrically arranged rotor causes the latter alternately to dip into and out of the liquid forming the annular liquid piston and by the combined action ne Y Vcompletely unseale'd bythe liquid piston) due to the rotation and to the eccentricity the air or other medium being operated upon is drawn in through an inlet port at one side of the rotor being guided into certain of the peripheral channels thereon by means of the deflecting plate adjacent to the port and from such channels it is during the further rotation of the rotor guided into the next set of channels by the nextk succeeding deflecting plate in the other port in the rotor and' after traversing such channels finally leaves the rotor through the port at that side remote from the one by which the medium entered.

Having now vparticularly described and ascertained the nature of my said invent-ion and in what manner the same is to be performed, I declare that what I claim is zl. A rotary compressor or eXhauster kcomprising in combination an outer casing, a rotor arranged eccentrically within said casing, a centrifugally held body of liquidin the space between said members, a plurality of independent webs on said rotor running completely round the circumference thereof and having a port through all said webs and means adjacent to said port for deflecting the gas from one lside, to the other of the rotor during its rotation, substantially as described.

2. A rot-ary compressor or eXhauster comprising in combination an outer casing, a rotor arranged eccentrically within said casing,.a centrifugally held body of liquid in the space between said members, a plurality of parallel equally spaced webs on said rotor arranged completely round the circumference thereof and having a port formed through all said webs and means adjacent said port for deflecting the gas from one side to the other kof the rotor substantially as described.

3. A rotary compressor or exhauster comprisingin combination an outer casing, a rotor arranged eccentricallywithin said casing, a centrifugally held body of liquid in the `space between said members, a plurality of independent webs on said rotor arranged completely round the circumference thereof and having a port formed through all said webs-and deflecting plates adjacent to said port, substantially as described.

4. A rotary compressor or exhauster comprising in combination an outer casing, a rotor arranged eccentrically within said casing, a centrifuga-ily held body of liquid in the space between said members, a plurality of inc ependent webs on said rotor arranged completely round the circumference thereof and having a port formed through all said webs and deliecting plates adjacent to said port of a depth suflicient to give a seal in the liquid but of less depth than the aid webs, substantially as described.

5. A rotary compressor or exhauster comprising in combination an outer casing, a rotor arranged eccentrically within said casing, a centrifugally held body of liquid in the space between said members, a plurality of independent webs arranged completely round the circumference on said rotor and having a port formed through all said webs, means adjacent to said port for deflecting the gas from one side to the other of the rotor and a shrouding plate at one side of said rotor, substantially as described. n

6. A rotary compressor or exhauster comprising in combination an outer casing, a rotor arranged eccentrically within said cas-` ing, a centrifugally held body of liquid in the space between said members, a plurality of independent webs arranged completely round the circumference on said rotor and having a port formed through all said webs, means adjacent to said port for deflecting the gas from one side to the other of the rotor and a shrouding plate spaced apart from the rotor to form an extension of the adjacent port and stop members for limiting such extensions substantially as described.

' In testimony whereof l have signed my name to this specification.

JOHN JOHNSTEN, 

